SECTION 16495

TRANSFER SWITCH

PART 1 GENERAL

SECTION INCLUDES

Automatic transfer switch.

Automatic transfer switch and bypass/isolation switch.

Manual transfer switch.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section 16425 - Switchboards: Installation of [transfer] [and] [bypass/isolation] switches in switchboards.

RELATED WORK

Section 16622 - Package Engine-Generator System: Testing requirements.

REFERENCES

NEMA ICS 1 - General Standards for Industrial Control and Systems.

NEMA ICS 2 - Standards for Industrial Control Devices, Controllers, and Assemblies.

NEMA ICS 6 - Enclosures for Industrial Controls and Systems.

QUALITY ASSURANCE

Manufacturer: Company specializing in automatic transfer equipment with [three] [_____] years [documented] experience.

SUBMITTALS

Submit product data under provisions of Section [01300.] [01340.]

Submit product data for transfer [and isolation/bypass] switches showing overall dimensions, electrical connections, electrical ratings, and environmental requirements.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include instructions for operating equipment.

Include instructions for operating equipment under emergency conditions[.] [when engine generator is running.]

Identify operating limits which may result in hazardous or unsafe conditions.

Document ratings of equipment and each major component.

Include routine preventive maintenance and lubrication schedule.

List special tools, maintenance materials, and replacement parts.

REGULATORY REQUIREMENTS

Conform to [applicable] [__________] code for [emergency] [standby] electrical systems.

Conform to [applicable] [__________] code for seismic conditions.

PART 2 PRODUCTS

MANUFACTURERS

[______________________________] Model [__________.]

[______________________________] Model [__________.]

[______________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

AUTOMATIC TRANSFER SWITCH

Description: NEMA ICS 2; automatic transfer switch[.] [suitable for use as service equipment.]

Configuration: Electrically-operated, mechanically-held transfer switch.

AUTOMATIC TRANSFER AND BYPASS/ISOLATION SWITCH

Description: NEMA ICS 2; automatic transfer switch with manual bypass switch.

Configuration: Draw-out type electrically-operated, mechanically-held transfer switch with manually-operated CONNECTED, TEST, and DISCONNECTED draw-out positions, and with mechanically-operated, mechanically-held transfer switch connected to bypass automatic switch.

Bypass Switch Ratings: Match automatic transfer switch for electrical ratings.

MANUAL TRANSFER SWITCH

Description: NEMA ICS 2; manual transfer switch[.] [suitable for use as service equipment.]

Configuration: Electrically-operated, mechanically-held transfer switch.

Sequence of Operation: Switch position is selected by control switch mounted [in switch cover.] [remotely.]

SERVICE CONDITIONS

Service Conditions: NEMA ICS 1.

Temperature: [_____] degrees F ([_____] degrees C).

Altitude: [3300] [6600] [_____] feet ([1000] [2000] [_____] M).

Exposure to [____________________.]

Seismic Conditions: [____________________.]

RATINGS

Ratings: NEMA ICS 2; as scheduled.

****** [OR] ******

Ratings: NEMA ICS 2; as follows:

Voltage: [__________] volts, [single] [three] phase, [three] [four] wire, 60 Hz.

Switched Poles: [3.] [4.] [_____.]

Load Inrush Rating: [Combination] [Tungsten lamp] [Electric discharge lamp] [Resistive] load.

Continuous Rating: [_____] amperes.

Interrupting Capacity: [_____] percent of continuous rating.

Withstand Current Rating: [_____] rms symmetrical amperes, when used with [Class [J] [K1] [L] current limiting fuse.] [molded case circuit breaker.]

AUTOMATIC SEQUENCE OF OPERATION

Initiate Time Delay to Start Alternate Source Engine Generator: Upon initiation by normal source monitor.

Time Delay to Start Alternate Source Engine Generator:

0 to [_____] seconds, adjustable.

Initiate Transfer Load to Alternate Source: Upon initiation by normal source monitor and permission by alternate source monitor.

Time Delay Before Transfer to Alternate Power Source:

0 to [_____] seconds, adjustable.

Initiate Retransfer Load to Normal Source: Upon permission by normal source monitor.

Time Delay Before Transfer to Normal Power: 0 to [_____] seconds, adjustable; bypass time delay in event of alternate source failure.

Time Delay Before Engine Shut Down: 0 to [_____] minutes, adjustable, of unloaded operation.

Engine Exerciser: Start engine every [7] [30] [_____] days; run for [30] [_____] minutes before shutting down. Bypass exerciser control if normal source fails during exercising period.

Alternate System Exerciser: Transfer load to alternate source during engine exercise period.

ENCLOSURE

Enclosure: ICS 6; Type [1.] [12.] [_____.]

ACCESSORIES

Indicating Lights: Mount in cover of enclosure to indicate NORMAL SOURCE AVAILABLE, ALTERNATE SOURCE AVAILABLE, SWITCH POSITION[,][.] [NORMAL BYPASS][,][.] [ALTERNATE SOURCE BYPASS.]

Test Switch: Mount in cover of enclosure to simulate failure of normal source.

Return to Normal Switch: Mount in cover of enclosure to initiate manual transfer from alternate to normal source.

Transfer Switch Auxiliary Contacts: [1] [_____] normally open; [1] [_____] normally closed.

Normal Source Monitor: Monitor [each line of] normal source voltage and frequency; initiate transfer when voltage drops below [85] [_____] percent or frequency varies more than [3] [_____] [percent] [Hertz] from rated nominal value.

Alternate Source Monitor: Monitor alternate source voltage and frequency; inhibit transfer when voltage is below [85] [___] percent or frequency varies more than [3] [___] [percent] [Hertz] from rated nominal voltage.

In-Phase Monitor: Inhibit transfer until source and load are within [_____] electrical degrees.

Switched Neutral: [Overlapping] [Non-Overlapping] contacts.

PART 3 EXECUTION

EXAMINATION

Verify that surfaces are ready to receive work.

Verify field measurements are as [shown on Drawings.] [instructed by manufacturer.]

Verify that required utilities are available, in proper location, and ready for use.

Beginning of installation means acceptance of existing conditions.

INSTALLATION

Install in accordance with manufacturer's instructions.

SCHEDULE

Switch No.: ATS-1

Location:	Electric Room No. 1

Voltage:	277/480 volts, three phase, four wire.

Switch Rating:	400 A continuous.

Neutral:	Overlapping contact.

Branch: Critical.

Enclosure:	Type 1.

Integrated Equipment Short Circuit Rating: 100,000 amperes rms symmetrical.

Switch No.: ATS-2

Location:	Electric Room No. 1

Voltage:	277/480 volts, three phase, four wire.

Switch Rating:	600 A continuous.

Neutral:	Overlapping contact.

Branch: Equipment.

Enclosure:	Type 1.

Integrated Equipment Short Circuit Rating: 100,000 amperes rms symmetrical.

Switch No.:	ATS-1

Location:	Electric Room No. 1

Voltage:	277/480 volts, three phase, four wire.

Switch Rating:	225 A continuous.

Neutral:	Solid.

Branch: Life Safety.

Enclosure:	Type 1.

Integrated Equipment Short Circuit Rating: 100,000 amperes rms symmetrical.

END OF SECTION